Home / 3,936.20-5,432.55-2,990.45

Finding the Fourth Proportional to 3,936.20, 5,432.55 and 2,990.45

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Solution

The fourth proportional to 3,936.20, 5,432.55 and 2,990.45 is: 4,127.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.20 : 5,432.55 = 2,990.45 : x
  2. Step 2: Convert to fraction form
    3,936.20/5,432.55 = 2,990.45/x
  3. Step 3: Cross multiply
    3,936.20x = 5,432.55 × 2,990.45
  4. Step 4: Simplify right side
    3,936.20x = 16,245,741.98
  5. Step 5: Solve for x
    x = 16,245,741.98/3,936.20
  6. Step 6: Final answer
    x = 4,127.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.